LOS ANGELES â€” A treatment for eye diseases that is derived from human embryonic stem cells might have improved the vision of two patients, bolstering the beleaguered field, researchers reported Monday.

The report, published online in the medical journal The Lancet, is the first to describe the effect on patients of a therapy involving...

Bone loss and osteoporosis develop so slowly in most women whose bones test normal at age 65 that many can safely wait as long as 15 years before having a second bone density test, researchers report in a new study.